Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022982 |
The Origin of Fine Sediment Determines the Observations of Suspended Sediment Fluxes Under Unsteady Flow Conditions | |
Juez, Carmelo1; Hassan, Marwan A.2; Franca, Mario J.3 | |
2018-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:8页码:5654-5669 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Canada; Netherlands |
英文摘要 | Field observations in a wide range of environments have shown that sediment availability is a major control on the suspended sediment observations in streams. Here we examine, via laboratory experiments, how the amount of proximal in-channel fine sediment storage relative to the upstream fine sediment distal supply influences the observations of suspended sediment concentrations in streams. Experiments under idealized conditions in a laboratory flume with different ratios of proximal and distal sediment supplies were conducted under a varying flow regime. In addition, the role of the sediment particle size of the supplied sediment on suspended sediment observations was explored. The combinations of proximal and distal sediment supply result in multiple responses of the channel bed and sediment quantity within the channel bed, and the responses adjust through aggradation and degradation. The signature of sediment concentration observed at the upstream section of the channel, given by the distal supply, differs from the downstream observations of the total conveyed sediment (distal and proximal), as shown by an in-phase analysis of sediment concentration-discharge plots. Furthermore, we show that nonuniform sediment mixtures may result in a change in the direction of the hysteresis observed between sediment concentration and discharge (i.e., from a clockwise hysteresis to a counterclockwise hysteresis). We also demonstrate that the ratio between sediment distal supply and proximal sediment availability modulates the magnitude of the aggradation/degradation processes in the channel reach and thus the joint observations of sediment concentration and discharge. |
英文关键词 | fine sediment suspended sediment transport (SSC) sediment hysteresis sediment budget sediment proximal storage sediment distal supply |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445451800028 |
WOS关键词 | MODELING WATER EROSION ; PHYSICAL PRINCIPLES ; UNIFIED VIEW ; RILL FLOW ; TRANSPORT ; CATCHMENT ; RIVER ; HYSTERESIS ; DYNAMICS ; RAINFALL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22057 |
专题 | 资源环境科学 |
作者单位 | 1.Ecole Polytech Fed Lausanne, Lab Construct Hydraul, Lausanne, Switzerland; 2.Univ British Columbia, Dept Geog, Vancouver, BC, Canada; 3.IHE Delft Inst Water Educ, Water Sci & Engn Dept, Delft, Netherlands |
推荐引用方式 GB/T 7714 | Juez, Carmelo,Hassan, Marwan A.,Franca, Mario J.. The Origin of Fine Sediment Determines the Observations of Suspended Sediment Fluxes Under Unsteady Flow Conditions[J]. WATER RESOURCES RESEARCH,2018,54(8):5654-5669. |
APA | Juez, Carmelo,Hassan, Marwan A.,&Franca, Mario J..(2018).The Origin of Fine Sediment Determines the Observations of Suspended Sediment Fluxes Under Unsteady Flow Conditions.WATER RESOURCES RESEARCH,54(8),5654-5669. |
MLA | Juez, Carmelo,et al."The Origin of Fine Sediment Determines the Observations of Suspended Sediment Fluxes Under Unsteady Flow Conditions".WATER RESOURCES RESEARCH 54.8(2018):5654-5669. |
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